In all the Pokemon games, there is a Move Deleter person. Talk to him to delete moves.
There is a move deleter who can make pokemon forget HM moves.
Pokemon cant forget hm thay can only forget TM
take the Pokemon to a guy in lilycove city and he makes them forget
Pokemon cannot forget HM's unless they're in Pokemon Mystery Dungeon. But, if its from Emerald, add another Pokemon to your party that knows surf and ask the move deleter.
talk to the move deleter
fly is an HM and no Pokemon can forget an HM.
move deleter in lilycve (end of game)
the move deleter is in canalave city in a house below the pkmn centerthere is a HM deleter in pastoria or in jubilife or in heatrome.
you cant
You can just reteach it since HM are reusable.
You send it to day care until it goes up 12 levels.
no their unforgetable